• Update to 3.0-1639-ga5325bf

Changes:

• Optimize jail startup/cloning/rollback and mtree comparisons.
• api: Make more useful
• check_fs_violation: Use mktemp rather than hard-coded tmpfile
• Fix false-positive 'Leftover processes' warning after disabling jexecd
• Conditionalize the jexec logic around USE_JEXECD and add back missing jkills.
• QEMU: Remove _MAKE_JOBS not present in release-3.1 and noted to break builds by sbruno
• Kill processes before remounting/rolling back the builder FS, rather than after.
• jail -c: Support older FREEBSD_HOST=ftp.freebsd.org URL schemes still. [1]
• jail -c: Support pre-distributed MANIFESTs for checksum comparing.

PR: 206848 [1]